"The nighttime, sniffling, sneezing, coughing, aching, stuffy-head, fever, indigo-blue medicine" was always doing chemistry.

"The nighttime, sniffling, sneezing, coughing, aching, stuffy-head, fever, indigo-blue medicine" was always doing chemistry. The blue is the giveaway.

FD&C Blue No. 2. Indigotine. The petroleum-derived dye that quietly powers the parts of the grocery store and pharmacy aisle nobody scrutinizes.

NyQuil LiquiCaps. The signature indigo-purple gel capsule shell is colored with FD&C Blue No. 2 Aluminum Lake. Pure visual signal. It has nothing to do with what is actually helping anyone sleep. The color is the brand cue.

Pet food. Blue 2 (typically blended with Red 40 and Yellow 5) is the workhorse behind dark kibble, gravy coatings, and "premium black" formulations on the shelf. Dogs are dichromatic. They cannot see the blue that was put in there for them. The color is for the shopper.

Zero nutritional value. Not a vitamin. Not a flavor. Not a preservative. Color for color's sake.

When the December 2027 FDA petroleum-dye phase-out lands, Blue 2 is on the list. Brands quietly leaning on it for the trust-blue capsule, the gravy-rich kibble, or the dark candy shell will need a real natural-color answer before the deadline becomes a recall.

DyeConverter is built for exactly that question.

#NaturalColorants #FDA2027 #CleanLabel #DyeConverter